Bearing cup extracting tool



Nov. 2, 1937.

B. cooK ET AL 2,098,134

BEARING CUP EXTRACTING TOOL Filed Nov. 13, 1936 2 et 1 a i a 7 e 4 /F i 272 BY Wm" w g:

ATTORNEYS Nov. 2, 1937. B. COOK ET AL 2,098,134

BEARING CUP EXTRACTI NG TOOL Filed NOV. 13, 1936 4 2 Sheets-Sheet 2 j (9' I Edward C f z g j mr.

ATTORNEYS Patented Nov. 2, 1937 PATENT OFFICE BEARING CUP EXTRACTING TOOL Bennie Cook, Oklahoma City, Okla., and Edward C. Pfeffer, Corpus Christi, Tex.

Application November 13, 1936', Serial No. 110,754

1 Claim.

axles from axle housings, and has for the primary object the provision of a device of this character which provides a durable, compact and complete tool for the above-named purposes and which will quickly, easily and safely remove parts from the axle housing without damage thereto.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of our invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a side elevation illustrating an extracting tool constructed in accordance with our invention and showing the same adapted toa portion of an axle housing.

Figure 2 is a vertical sectional view illustrating the same.

Figure 3 is a transverse sectional view taken on the line 3--3 of Figure 1.

Figure 4 is a fragmentary plan view illustrating a dog holding member of this invention.

Figure 5 is an end elevation illustrating the same.

Figure 6 is a side elevaton, partly in section, showing the invention arranged for the removal or extraction of a grease retainer.

Figure 7 is a side elevation partly in section showing the dog carrying member which is employed when extracting a grease retainer.

Figure 8 is a vertical sectional view showing the dogs held collapsed prior to being brought in engagement with the grease retainer.

Figure 9 is an end view showing the dogs in spread position of the member employed for extracting the grease retainer.

Referring in detail to the drawings, the numeral I indicates a substantially tubular shaped housing, one end of which is provided with a flange 2 apertured to receive stud bolts or like fasteners 3 for detachably securing the housing I to the end of an axle housing 4 of a motor vehicle. The housing I when connected to the axle housing as described will be maintained in perfect alignment with said axle housing and against movement relative thereto. The housing I is internally grooved adjacent its other end to form a seat 5 for an anti-friction bearing 6. The antifriction bearing rotatably supports a nut I which includes a cylindrical portion 8 and wrench engaging faces 9. The cylindrical portion 8 fits in the anti-friction bearing 6.

A dog carrying member I0 of hollow formation has threaded engagement with the nut I and extends into the housing I. The end of the member I0 within the housing is enlarged to form a head I I provided with grooves I2 to receive the dogs I3. Also the head has a conical shaped bore I4 to receive a dog spreading element I5. The dog spreading element I5 is formed on a rod I6 which extends through the dog carrying member I l? and has a nut II threaded thereon. A cup-shaped element I8 is carried by the member Ill adjacent the head for aiding in retaining the dog in the grooves I2 for a limited movement inwardly and outwardly of said grooves.

Each dog has a hook I9 at one end and a hook 211 at the opposite end. The books I9 and 20 extend in opposite directions. The hook I9 engages the work to be extracted from the axle housing while the hook 20 engages in a recess 2I formed in the member ID and communicating with the grooves I2. The recess 2I and the cup-shaped element I8 cooperate in pivotally mounting the dogs to the head II. The dogs have formed thereon beveled shoulders 22 adapted to ride against a conical-shaped portion 23 of the dog spreading member I5.

The housing I has connected thereto a key 24 a by a flexible element 25. The housing has a slot 26 to permit the key to extend into the housing for entering a slot 21 formed in the member Ill. The slot 26 is approximately the width of the keys thickness while the slot 2'! in length is several times greater than the width of the key. The key positioned in the slots 26 and 21 secures the member ID to the housing I against rotation relative thereto but will permit the member IE] to have sliding or endwise movement relative to the housing.

In operation, after the application of the housing I to the axle housing as heretofore described and the dogs I 3 are positioned so the hooked ends I9 engage the inner edge of the bearing cup, the nut I is rotated in a proper direction causing an endwise movement of the member ID. This endwise movement of the member II] draws the bearing cup outwardly of the axle housing into the housing I without mutilation or damage thereto.

It is to be understood that the dogs are adjusted in engagement with the bearing cup by rotating the nut IT in the proper direction.

'I'o adapt this invention for the purpose of extracting a grease retainer 28 from the axle housing, the dogs 13 and spreading element l5 are not used and members 29 and 30 employed in lieu thereof. The member 29 is similarly constructed to the member l0 without the grooves or dogs and the bore thereof has a conical-shaped portion and a cylindrical-shaped portion, as clearly shown in Figure 6. The member 30 consists of a screw threaded rod 3| to receive the nut l1 and extends through the member ID and has a head 32 grooved, as shown at 33. Dogs 34 are pivotally mounted to the head 32 within the grooves and are engaged by expansion springs 35 acting to urge said dogs outwardly of the grooves. The pivoted ends of the dogs have shoulders 36 to abut the head 32 when the dogs are in spread position.

In operation, the dogs 34 are held in the grooves 33 by extending into the cylindrical portion of the head of the member [0. The device is then inserted in the axle housing with the housing I bolted to the latter until the dogs are past the lubricant retainer 28, the latter then assuming the position shown in Figure 6, having engagebearing, a rod extending through the dog carrying member, a head formed on said rod, a nut threaded to said rod and engaging the dog carrying member, and spring pressed dogs pivoted to said head and held collapsed by the dog carrying member until said member is freed thereof permitting said dogs to expand to engage with a grease retainer.

BENNIE COOK. EDWARD C. PFEFFER. 

